Slinky - Your slack links — organized!
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
Top Daily Hunts in Slack - A simple, fast way to browse news within Slack
Kifi for Slack - Get links messaged on Slack in Google Search results
Slack-News - Read news from multiple sources within Slack by just typing
Google News - Comprehensive up-to-date news coverage, aggregated from sources all over the world by Google News.